Electronic navigational aids

.1 GPS Satellite... (number) unusable from... (date and time) to... (date and time).

Cancel one hour after time of restoration.

.2 LORAN station... (name or number of master / slave) off air from... (date and time) to

... (date and time). Cancel one hour after time of restoration.

.3 DECCA... (identify chain and colour) off air from... (date and time) to... (date and

time).

Cancel one hour after time of restoration.

.4 RACON... (name of station) in position... off air from... (date and time) to... (date

and time). Cancel one hour after time of restoration.

Seabottom characteristics, wrecks

Use REPORTED when position is unconfirmed, and use LOCATED when

position has been confirmed by survey or other means

.1 Uncharted reef / rock / shoal / dangerous wreck / obstruction

reported / located in position....

.2 Dangerous wreck in position... marked by... (type) buoy... (distance in

kilometres/nautical miles)... (direction).

Miscellaneous

.5.1 Cable, pipeline and seismic / hydrographic operations

.1 Cable / pipeline operations by... (vessel) in vicinity / along line joining... (positions)

from... (date and time) to... (date and time). Wide berth requested (if requested).

Contact via VHF Channel... (if requested).

.2 Seismic survey / hydrographic operations by... (vessel) from... (date and time) to...

(date and time) in... (position). Wide berth requested. (if requested). Contact via VHF

Channel... (if requested).

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ANNEX

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.3 Survey vessel... (name) towing... (length) seismic cable along line joining / in area

bounded by / in vicinity... (position) from... (date and time) to... (date and time).

Wide berth requested (if requested). Contact via VHF Channel... (if requested).

.4 Hazardous operations by... (vessel) in area bounded by / in vicinity... (position)

from... (date and time) to... (date and time). Wide berth requested (if requested).

Contact via VHF Channel... (if requested).

.5 Current meters / hydrographic instruments moored in... (position). Wide berth

requested (if requested).

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